Staple



Feb. 24, 1931. E. s. MILLER ET AL S TAPLE Filed March 26, 1927 Patented Feb. 24, 1931 rrsn stares rA'rsNr OFFICE EMMET S. MILLER AND RUSSELL W. STAMBAUGH, OF MILWAUKEE, WISCONSIN, .AS-

SIGHORS, BY MESITE ASSIGNMENTS, TO MILCOR STEEL COMPANY, OF MILWAUKEE,

' WISGONSIN, A CORPORATION OF DELAWARE STAPLE Application filed'March 26, 1927. Serial No. 178,592.

This, invention relates to certain new and useful improvements in staples for use in securing inserts in place, of the character described in the application of ourselves and George W. McKown, tiled May 8, 1925, Serial No. 28,821.

Heretofore, it has been customary to utilize common staples or nails to secure the inserts in place, which has proven objectionable in that the nails or staples do not even approach the shape of the insert and further, that they exert no anchoring force after the joists ot' the form have been removed, and this invention contemplates as one of its objects the provision of an improved staple the inside shape of the upper portion of which conforms with the cross-sectional shape of the insert and the ends of which, upon being driven home in the joist clinch over tae insert to secure the same firmly in place.

A more specific object of this invention resides in the provision of an improved staple, the upper major portion of which is of substantially V shape at its inner side and from which prongs depend vertically, there being reinforcing ribs therein, the ribs of the prongs inclining inwardly with respect to the prongs, to draw or clinch the same across the widest point ofthe upper portion of the V.

And a still further object of this invention resides in the provision of an improved staple of the character described which is stamped from sheet metal and so shaped to prevent its buckling while being driven home, and which is so designed as to have maximum strength.

WVith the above and other objects in view, which will appear as the description proceeds, our invention resides in the novel construction, combination and arrangement of parts substantially as hereinafter d scribed and more particularly defined by the appended claims, it being understood that such changes in the precise embodiment of the herein-disclosed invention may be made as come within the scope of the claims.

In the accompanying drawing, we have illustrated one complete example of the physical embodiment of our invention constructed according to the best mode we have so far devised for the practical application of the principles thereof, and in which:

Figure 1 is a fragmentary perspective view, partly in section and partly in elevation, taken through the ceiling of a concrete building, the forms being illustrated in position of pouring the concrete;

Figure 2 is a plan View of one of our improved staples detached from the form;

, Figure 3 is a view, partly in elevation and partly in section, taken through Figure 1 on the plane of the line 33, and

Figure 4 is a transverse sectional view through a staple on the plane of the line l-4.

Referring now more particularly to the accompanying drawing. in which like numerals designate like parts throughout the several views, numeral 5 designates the wall joists or longitudinal supports adapted to be secured in place by staple members, not shown, to support the metal forms 6 prior to the pouring of the concrete 7 to form the floor to which the ceiling of the floor below is to be attached.

As explained in the co-pending application hereinabove mentioned, divers, tedious and expensive methods have heretofore been employed to attach the metal lathing, not shown, to the wall ceiling joists, all oi which have been rather expensive and have required the services of extremely skilled workmen. The invention described and claimed in said co pending application contemplates the provision of inserts in the form of elongated shields or projecting members 8 which are placed into molds before the concrete is poured, and, consequently, are embedded therein, and which carry means to which the lathing, not shown, may be readily secured in the manner described in said application. In the present instance, the insert 8 has been illustrated as of substantially triangular shape, having its bottom wall recessed to facilitate the insertion therethrough of tying wires, not shown, for the metal lathing.

It is necessary that the insert be firmly secured in place on the joists 5 prior to the pouring ot' the concrete, and, heretofore, this has been accomplished by the means of ordiand bending them over the insert. This man nor of securing the inserts in place has been objectionable in that the staples do not, assist in anchoring the insert in place and are difficult to apply as they frequently flatten out upon being driven home, and, therefore, do not 01TH any assistance whatsoever to the anchoring of the insert in the concrete and insecurely retain the inserts in the mold,

The improved staple 9 illustratedin Figure 1' is one that may becheaply made as it is stamped entirely from sheet metal and confirms to the walls of the insert, secures the inserts firmly to the oists and assists in anchoring thesarne in place and is so con-' structed that it does not buckle or collapse in anyway under the stress of being driven home. The st to conform w the cross-sectional shape of the insert, its inner wall inclining downwardly and outwardly from a central point 10 to points 11 so that a straight line connecting the points 11 make an opening corresoondin with the cross-sectional shape .l. t: 1

the insert, and the inside walls of the staple ext-end straight downwardly from the points 11 in the manner best shown in Figure 2. The outside shape of the staple is preferably as shown, having a flat top 13 which is of a width approximately that of the distance between the points 11 which incline downwardly and outwardly therefrom, at an angle slightly less than that between the points 10 and 11, to points 14 where it extends downwardly to points 15, and is then inclined inwardly to the end of the straight wall 12 thus forming two projecting pointed members, or prongs 16.

The staple 9 is reinforced bya bead 17 struck up from each leg and the angle between the upper portions of the beads is less than that between the inner walls between the points 10 and 11. The lower portions 18 of the beads in the prongs 16 are inclined downwardly and inwardly so that, when the staple is driven home, the portions 18 of the beads tend to draw the prongs inwardly, as

illustrated at Figure 3, and firmly engage the insert in place. The squared portions of the staple between the points it and 15 cooperate with the bead 17 and prevent collapsing of he staple while being driven home;

After the concrete has set and the joists 5 removed, the prong 16 projects beyond the concrete, and may be left undisturbed inasmuch as they do not interfere with the application of the metal lathing, or may be bent either longitudinally or transversely of the insert, either manner of bending the prongs assisting in anchoring the insert in place.

From the foregoing description, taken in connection with the accompanying drawing, it will be readily apparent to those skilled in the art to which an invention of the charple 9 has its inside area shaped acter described appertains that we provide an improved staple for use in connection with inserts which may becheaply made,

which will very efiiciently secure the insert in I 1. A staple of the character described stamped from bendable metal and having its upper portion substantially inverted V- shaped, prongs projected from the ends of the V, the topof said staple at the closed end of the V being substantially flat to provide a driving surface, and a strai ht surface on the exterior of the arms of the V at the juncture between its ends and its prongs to reinforce the staple.

2. A staple of the character described, stamped from bendable metal and having its upper portion substantially inverted V- shaped, prongs projected from the ends of the e, the top of said staple at the closed end of the e being flat to provide a driving surface for the same, a substantially straight surface on the exterior of the arms of the V at the juncture between its ends and its prongsto reinforce the same, and reinforcing beads in the arms of the staple.

3. A staplefof the character described, stamped from bendable metal and having its upper portion substantially. inverted V- shaped, prongs projected from the ends of the V, a driving surface on the top of said staple at the closed end of the V, a substantially straight surface on the exterior of the arms of the V at the juncture between its ends and its prongs to reinforce the same, reinforcing beads in the arms of the staple, and the portion of said beads within the prongs of the staple being inclined inwardly toward the opening therebetween whereby the prongs are clinched inwardly as the staple is driven home. I

4. A staple stamped from bendable metal and having outwardly directed legs, and prongs extended from the legs, the inner edges of the prongs being substantially parallel and the outer edges being directed in wardly towards the opening therebetween to direct the prongs inwardly as the stapleis driven home.

5. A staple stamped from bendable metal and having outwardly; directed legs, prongs extended from the legs, the inner edge of the prongs being substantially parallel and the outer edges being directed inwardly towards the opening .therebetween to direct the prongs inwardly as the staple is driven home, and reinforcing beads formed in the legs of the staple and continuing through thelength of the prongs, the beads in the prongs being directed inwardly to assistthe outer edge of the prongs in directing them inwardly.

6. The combination with an elongated tubular insert adapted to be embedded in a 0011- crete portion of a building at the time of pouring, means for securing the insert against shifting in a form for the concrete, comprising staples straddling the insert and driven into the form at intervals along the length of the insert said staples having an inner shape similar to the cross sectional shape of the insert to snugly embrace that portion of the insert above the form and increase the rigidity of the insert.

7. The combination With an elongated tubular insert triangularin cross section and adapted to be embedded in a concrete portion of a building at the time of pouring, of means for securing the insert against shifting in a form for the concrete, comprising staples straddling the insert and driven into the form at intervals along the length of the insert, and said staplesbeing stamped of bendable metal and having an inner shape similar to the triangular cross section of the insert to engage the side Walls of the insert upon being driven home and form substantially transverse flanges to increase the rigidity of the insert.

In testimony whereof We hereunto aflix our signatures.

EMMET S. MILLER. RUSSELL W. STAMBAUGH. 

